KR20100089637A - Cleaning system for waste-water purifier - Google Patents

Abstract

The present invention relates to a wastewater treatment system using membrane separation, by allowing the treatment flow rate to be flexibly adjusted according to the membrane treatment capacity through a wastewater treatment system consisting of a BNR (Biological Nutrient Removal) process, a membrane separation process, and an ozone contact process. The purpose is to determine the treatment flow rate of the membrane to be linked to the wastewater generation flow rate according to the operation rate of the treatment company, to minimize the differential pressure increase of the membrane according to the operating time, and consequently to increase the period for which the forced cleaning is required. The present invention configured for this purpose is a flow rate adjustment tank made of inflow of raw waste water; A BNR reactor for removing nitrogen by forming anoxic conditions or aerobic conditions through water stirring and surface aeration; Stirring the wastewater in the BNR reactor in water or stirring the surface aeration; Raw waste water transfer means for transferring the raw waste water inside the flow rate adjustment tank into the BNR reactor; A membrane separation tank for continuously supplying oxygen to the wastewater transferred from the BNR reaction tank through an acid group to remove nitrogen by nitrification and to remove phosphorus by excessive intake of microorganisms and to separate solid-liquid separation under aerobic conditions; Diffuser means for supplying dissolved oxygen into the membrane separation tank; Membrane separation means for immersing in the wastewater inside the membrane separation tank for solid-liquid separation of the wastewater; Excess sludge drawing means for drawing excess sludge from the BNR reactor and the membrane separation tank; Degassing tank for introducing the supernatant from the membrane separation tank to induce denitrification through the reduction of dissolved oxygen; Degassed water returning means for returning degassed water to a BNR reactor; A membrane treated water storage tank for storing membrane treated water in which solid-liquid separation is performed through membrane separation means; A membrane treated water discharge pipe discharged into the discharge water system of the membrane treated water storage tank; The membrane treated water discharged through the membrane treated water discharge pipe is introduced to disinfect and disinfect and remove organic and inorganic contaminants through contact with ozone (O ₃ ) to generate recycled water that can be reused as industrial water. Ozone contact means; And a membrane separation means for cleaning the membrane separation means to remove the adhered foreign matter.

Description

Wastewater treatment system using membrane separation {Cleaning system for waste-water purifier}

The present invention relates to a wastewater treatment system using a membrane separation to ensure a stable treatment water through the advanced treatment of wastewater, more specifically, BNR (Biological Nutrient Removal) process, membrane separation process and ozone contact process The present invention relates to a wastewater treatment system using membrane separation that enables to stably treat wastewater and wastewater, as well as to allow cleaning of the flat membrane module through the cleaning module in the system.

It is well known that there is a lack of awareness of the importance of the environment in the course of rapid economic development. Due to this lack of awareness of environmental conservation, the level of pollution as well as air quality has reached a very serious level. In particular, domestic sewage, agricultural and livestock wastewater, and industrial wastewater cause pollution of public waters such as appeals, inner bays and inland seas, and urban small and medium rivers.

In recent years, due to rapid industrial development, population growth, and urban population concentration, the proportion of inorganic and organic components in wastewater and wastewater is gradually increasing along with the increase of various water volumes. Such waste water contains high concentrations of organic substances such as chemical oxygen demand (COD), biochemical oxygen demand (BOD), suspended solids (SS), nitrogen and phosphorus, and flows into rivers, lakes, dams, etc. Pollution, as well as the destruction of the ecosystem due to toxicity will adversely affect the environment. Therefore, the waste water and waste water are set to a predetermined standard, and purified and drained to below a predetermined standard value.

On the other hand, the water treatment technology using the membrane as a water pollution control technology has emerged a variety of toxic contaminants, advanced processing technology for removing them and technology to increase the removal efficiency of the existing treatment facility has been very useful. In particular, the water treatment technology using the membrane is a combination of 1) chemical treatment, biological treatment and membrane, 2) chemical treatment and membrane, and 3) physical treatment and membrane. Is being applied.

However, the water treatment technology using the membrane as described above is expanding the application of the membrane process for water treatment, hardly decomposable industrial wastewater treatment, livestock wastewater treatment, secondary treatment of landfill leachate, and contaminated groundwater treatment. Easily fouling is a major problem for usability.

As described above, when the permeation rate (permeability), which is a performance indicator of the membrane, is reduced, it is reused through various cleaning processes, but the membrane performance cannot be recovered 100% by the conventional cleaning method utilizing cleaning chemicals, compressed air, and washing water. In addition, there is a problem that generates another secondary pollution by the chemicals used in the cleaning process. In particular, the conventional cleaning method adopts most of the backwashing method which temporarily cuts off the flow during operation of the membrane, and thus stops the flow of the process periodically.

In other words, the water treatment technology using the membrane according to the prior art, because the foreign matter in the waste water is stuck to the separation membrane in the process of waste water treatment to block the micropores, so that a smooth and stable amount of treated water is not secured during long-term use. The problem is that the wastewater treatment process is not only delayed, but also inconvenient because the manager has to remove and clean each flat membrane module in a state where the wastewater treatment process is completely stopped when cleaning the membrane module. In the process of separating and cleaning the membrane module, there is a problem in that the membrane is damaged and a secondary pollutant caused by chemical cleaning may be caused, thereby increasing the management cost.

Therefore, it is necessary to develop a method capable of cleaning the membrane continuously without interruption of the fluid flow and a technique capable of suppressing the clogging caused by the contamination of the membrane. In other words, there is a need for a technology that enables the membrane module to be cleaned simultaneously while stably treating wastewater.

The present invention has been made to solve the above-mentioned problems of the prior art, it is possible to flexibly increase the treatment flow rate according to the membrane treatment capacity through a wastewater treatment system consisting of a Biological Nutrient Removal (BNR) process, a membrane separation process and an ozone contact process. By adjusting it, the treatment flow rate of the membrane is determined so as to be linked to the wastewater generation flow according to the operation rate of the treatment company. The purpose is to provide a wastewater treatment system using separation.

Another object of the technology according to the present invention is to configure the cleaning means using ultrasonic waves to allow the cleaning of the membrane in the wastewater treatment system so that the treatment of the wastewater and the membrane can be simultaneously performed while operating the membrane continuously without interruption of the fluid flow. To allow cleaning to take place.

Still another object of the technology according to the present invention is to provide a cleaning means using ultrasonic waves to clean the membrane in the wastewater treatment system so that the wastewater can be simultaneously treated and the membrane can be cleaned at the same time without the flow of fluid. It is possible to improve the operating efficiency of the wastewater treatment system by continuously improving the permeation rate of the membrane by allowing the cleaning to be performed during operation.

In addition, the technology according to the present invention increases the chemical cleaning cycle by removing foreign substances such as scales and suspended solids attached to the separator of the flat membrane module through the configuration of the cleaning module using ultrasonic waves to minimize the generation of secondary pollutants due to chemical cleaning The purpose is to make it possible.

The present invention is configured to achieve the object as described above is as follows. That is, the wastewater treatment system using the membrane separation according to the present invention is the flow rate adjustment tank in which the initial inflow of the wastewater is made, the initial precipitation of organic or inorganic substances; A BNR reactor for removing the organic matter contained in the raw water and nitrogen through denitrification and nitrification by forming anoxic conditions or aerobic conditions through the stirring and surface aeration of the raw waste water transferred from the flow adjusting tank; Underwater agitation surface aeration equipment installed on the BNR reaction tank to form an aerobic condition through the agitation of the raw waste water transported or through the supply of oxygen through the surface aeration of the raw waste water; Raw waste water transfer means for transferring the raw waste water inside the flow rate adjustment tank into the BNR reactor; A membrane separation tank for continuously supplying oxygen to the wastewater transferred from the BNR reaction tank through an acid group to remove nitrogen by nitrification and to remove phosphorus by excessive intake of microorganisms and to separate solid-liquid separation under aerobic conditions; An aerobic means for continuously supplying dissolved oxygen through an acid group into the membrane separation tank so that aerobic conditions are established; Membrane separation means for immersing in the wastewater inside the membrane separation tank for solid-liquid separation of the wastewater; Excess sludge drawing means for drawing excess sludge precipitated inside the BNR reactor and the membrane separation tank; Degassing tank for introducing the supernatant from the membrane separation tank to induce denitrification through the reduction of dissolved oxygen contained in the supernatant; Degassing water conveying means for conveying the degassing water degassed in the degassing tank to the BNR reactor; A membrane treated water storage tank for storing membrane treated water in which solid-liquid separation is performed through membrane separation means; A membrane treated water discharge pipe discharged into the discharge water system of the membrane treated water storage tank; The membrane treated water discharged through the membrane treated water discharge pipe is introduced to disinfect and disinfect and remove organic and inorganic contaminants through contact with ozone (O ₃ ) to generate recycled water that can be reused as industrial water. Ozone contact means; And a membrane separation means for cleaning the membrane separation means to remove the adhered foreign matter.

Raw wastewater transfer means in the configuration of the present invention as described above is a wastewater transfer pipe connected to the BNR reaction tank from the flow rate adjustment tank; And it may be made of a raw waste water transfer pump for transferring the raw waste water introduced into the flow rate adjustment tank into the interior of the BNR reactor through the raw waste water transfer pipe.

The air dispersing means constituting the present invention is provided on the inner bottom surface of the membrane separation tank is provided with a plurality of acid pores formed at a predetermined interval of the oxygen pores are supplied; And a blower that continuously supplies oxygen to the diffuser.

Membrane separation means constituting the present invention is a membrane separation module assembly which is installed on the upper side of the diffuser in the membrane separation tank; A treated water conveying tube for transferring the treated water separated by the membrane separating module assembly to the treated water storage tank; And a suction pump installed on the treated water transport pipe to separate solid solution from the membrane separation module assembly through suction pressure.

The membrane separation module assembly constituting the membrane separation means is installed on the upper side of the diffuser in the membrane separation tank, the assembly housing opened up and down; And installed in the interior of the assembly housing at a predetermined interval may be composed of a plurality of flat membrane modules to filter off the foreign matter in the suction process by the suction pump to separate the liquid.

The excess sludge drawing means constituting the present invention is a sludge drawing pipe which is installed in each of the BNR reaction tank and the membrane separation tank and piped; An on / off valve installed on the sludge drawing pipe of each of the BNR reactor and the membrane separation tank to enable the selective drawing of the excess sludge; And a sludge suction pump installed on the combined sludge drawing pipe to suck and discharge excess sludge settled in the lower side of the BNR reaction tank and the membrane separation tank through suction pressure.

Degassing water conveying means constituting the present invention comprises a degassing water conveying pipe connected to the BNR reaction tank from the degassing tank; And a degassing water return pump installed on the degassing water return pipe to return the degassed water in the degassing tank to the BNR reactor.

In addition, the ozone contact means constituting the present invention includes a membrane treated water inflow pump for introducing the membrane treated water discharged through the membrane treated water discharge pipe; And a film contacting the treated injecting ozone (O ₃₎ to the number of films processed introduced through the inlet pump ozone (O ₃₎ by removing the oxidation of sterilization and wire and inorganic pollutants by which can be reused as industrial water It may consist of an ozone contactor for producing recycled water.

In addition, the membrane separation cleaning means constituting the present invention comprises a cleaning tank for moving the membrane separation module assembly on the membrane separation tank therein; A reuse water supply pipe for supplying recycled water generated through an ozone contactor to the inside of the cleaning tank to immerse the membrane separation module assembly transferred into the cleaning tank; An air dispersing means installed at an inner lower portion of the washing tank and forming air bubbles through the air disperser to supply the inside of the membrane separation module assembly positioned at an upper portion thereof; An ultrasonic vibrator installed at an inner lower portion of the cleaning tank to separate the scales or contaminants attached to the separator of the flat membrane module constituting the module assembly through ultrasonic vibration by the oscillation of the ultrasonic wave or to weaken the adhesion thereof; And washing water conveying means for conveying the washing water inside the washing tank to the flow rate adjusting tank after washing through the ultrasonic vibration by the ultrasonic vibrator.

In the structure of the membrane separation cleaning means described above, the air dispersing means for cleaning is provided on the inner bottom surface of the cleaning tank, the air diffuser having a plurality of acid pores through which oxygen is supplied at regular intervals; And a blower that continuously supplies oxygen to the diffuser. At this time, the diffuser of the dispersing means for cleaning is an extension of the diffuser means for continuously supplying dissolved oxygen into the membrane separation tank, and the blower of the dispersing means for cleaning continuously supplies the dissolved oxygen to the inside of the membrane separation tank. It can be made of a configuration of the blower of the diffuser.

And, in the configuration of the membrane separation washing means described above, the washing water conveying means comprises: a washing water conveying pipe connected to the flow rate adjusting tank from the washing tank; And a washing water conveying pump installed on the washing water conveying pipe and conveying the washing water from the washing tank to the flow rate adjusting tank through the washing water conveying pipe.

On the other hand, in the configuration according to the present invention, a plurality of media balls may be further formed inside the membrane separation tank and the module assembly to separate foreign substances adhering to the separation membrane through the interference with the separation membrane of the flat membrane module. have. That is, the media ball flows between the flat membrane modules installed at regular intervals while rising with bubbles to prevent foreign substances from adhering to the surface by interfering with the separator, and after rising, the media ball is recycled back to the lower side of the module assembly continuously after the flow. It may be made of a configuration having a constant size and weight to clean the separator.

The media ball configured as described above may be formed in the form of a polygon with a wing plate integrally formed at each end of a spherical or star shape with an entire outer surface, and the media ball may be polyethylene, acrylonitrile butadiene styrene, teflon, vinyl chloride and poly It may be formed of any one material of the urethane.

According to the technology of the present invention, it is possible to flexibly adjust the treatment flow rate according to the membrane treatment capacity through a wastewater treatment system consisting of a Biological Nutrient Removal (BNR) process, a membrane separation process, and an ozone contact process. The treatment flow rate of the membrane is determined so as to be linked to the wastewater generation flow rate to minimize the differential pressure increase of the membrane according to the operation time, and consequently to increase the period for which the forced cleaning is required.

In addition, according to the technique of the present invention by configuring the cleaning means using ultrasonic waves to allow the cleaning of the membrane in the wastewater treatment system so that the treatment of the wastewater and the membrane can be carried out at the same time, while cleaning the membrane continuously without operating the flow of fluid This can be done.

In addition, according to the technique of the present invention by the configuration of the cleaning means using ultrasonic waves to allow the membrane to be cleaned in the wastewater treatment system to allow the treatment of the wastewater and the membrane at the same time to operate the membrane continuously without interruption of the fluid flow By allowing the cleaning to be performed, it is possible to continuously improve the permeation rate of the membrane to improve the operating efficiency of the wastewater treatment system.

Furthermore, the technique according to the present invention increases the chemical cleaning cycle by removing foreign substances such as scales and suspended matter attached to the separator of the flat membrane module through the configuration of the cleaning module using ultrasonic waves to minimize the generation of secondary pollutants due to chemical cleaning. You can do it.

Hereinafter, a wastewater treatment system using membrane separation according to the present invention will be described in detail.

1 is a block diagram showing a wastewater treatment system using a membrane separation according to the present invention, Figure 2 is a block diagram showing a wastewater treatment system using a membrane separation according to the present invention, Figure 3a is a membrane separation according to the present invention 3 is a perspective view showing the configuration of the membrane separation tank in the configuration of the wastewater treatment system, Figure 3b is a plan view showing the configuration of the membrane separation tank in the configuration of the wastewater treatment system using the membrane separation according to the present invention, Figure 3c 3D is a cross-sectional view showing the configuration of the membrane separation tank in the configuration of the wastewater treatment system using the membrane separation according to the present invention, FIG. 3D is an enlarged cross-sectional view showing the configuration of the membrane separation tank in the configuration of the wastewater treatment system using the membrane separation according to the present invention, FIG. Figure 4a is a perspective configuration diagram schematically showing the configuration of the cleaning means in the configuration of the wastewater treatment system using the membrane separation according to the present invention, Figure 4b is a membrane separation according to the present invention Using a cross-sectional diagram schematically illustrating the configuration of a cleaning means in the configuration of the wastewater treatment system.

1 to 4, the wastewater treatment system 100 using the membrane separation according to the present invention is an anoxic condition for the raw wastewater transferred from the flow rate adjustment tank 110, the flow rate adjustment tank 110 in which the raw wastewater is introduced. Under the aerobic conditions, the raw wastewater installed on the BNR reactor 120 and the BNR reactor 120 to remove nitrogen through removal and denitrification and nitrification of the organic matter contained in the raw water is subjected to anoxic conditions through agitation or surface aeration. Alternatively, the wastewater conveying means for transferring the wastewater from the surface stirring apparatus 122 and the flow adjusting tank 110 to create the aerobic conditions to the BNR reactor 120, and continuously carries oxygen to the wastewater transferred from the BNR reactor 120. Dissolved acid through acid in the membrane separation tank 130 and membrane separation tank 130 where nitrogen is removed by nitrification, phosphorus components are removed by excessive intake of microorganisms, and solid-liquid separation is carried out under aerobic conditions. Aeration means for continuously supplying cattle to create an aerobic condition, membrane separation means for immersed in the waste water inside the membrane separation tank 130, the solid-liquid separation of waste water, BNR reactor 120 and the inside of the membrane separation tank 130 The excess sludge drawing means for drawing out the excess sludge precipitated in the inlet, the degassing tank 150, degassing tank 150 to induce denitrification by reducing the dissolved oxygen contained in the supernatant by introducing the supernatant from the membrane separation tank 130 Degassed water carrying means for returning the degassed water degassed to the BNR reaction tank 120, the membrane treated water storage tank 160 for storing the treated water in which the solid-liquid separation is carried out through the membrane separation means, the membrane treated water storage tank ( Membrane sterilization through contact with ozone (O ₃ ) by injecting the membrane treated water discharged through the membrane treated water discharge pipe 162 and the membrane treated water discharge pipe 162 to collect the supernatant of 160 or discharged to the discharge water system. And deoxidation of organic and inorganic pollutants W comprises a configuration including ozone contact means and membrane separation means, a membrane cleaning means for cleaning by removing the foreign matter adhered to create a reuse number, which can be reused as industrial water.

The wastewater treatment process through the wastewater treatment system 100 using the membrane separation according to the present invention configured as described above, as shown in Figures 1 and 2, the raw wastewater, such as waste water flows into the flow control tank 110 This results in the initial settling of organic and inorganic contaminants in particulate matter or raw waste water. Of course, by adjusting the flow rate of the raw wastewater according to the treatment capacity of the wastewater control station 110, the overload is not applied.

On the other hand, as described above, the raw waste water in which the initial precipitation is made through the flow adjusting tank 110 is transferred into the BNR reaction tank 120 through the raw waste water transfer means. As such, the wastewater transported into the BNR reactor 120 is formed under anaerobic digestion and denitrification by anoxic conditions or an aerobic condition according to the surface aeration of the wastewater. Nitrification removes nitrogen. In other words, anaerobic digestion and denitrification reaction with organic matter is made by continuously creating anoxic conditions through agitation, and nitrogen is removed, and aerobic conditions are provided through surface aeration to supply oxygen to the wastewater. Nitrogen in the wastewater is removed through nitrification.

As described above, excess sludge is precipitated to the lower portion of the BNR reactor 120 in the process of becoming nitrogen through anaerobic digestion, denitrification, and nitrification in the interior of the BNR reactor 120. As such, the wastewater in which nitrogen is somewhat removed through anaerobic digestion, denitrification, and nitrification is introduced into the membrane separation tank 130. At this time, the wastewater flowing into the membrane separation tank 130 is introduced by the level difference, and the introduced wastewater is the supernatant on the BNR reaction tank 120.

As described above, the wastewater, which is the supernatant introduced into the membrane separation tank 130 by the level difference from the BNR reaction tank 120, is formed under aerobic conditions by oxygen supplied by the acidic means, so that Removal takes place. In other words, the nitrogen present in the wastewater is removed through nitrification under the conditions of dissolved oxygen supplied by the acidic means, and various organic matters contained in the wastewater are incubated to continuously incubate a mixed group of microorganisms in the presence of dissolved oxygen. Phosphorus is removed.

In addition, the wastewater introduced into the membrane separation tank 130 is separated through the membrane separation means, the solid-liquid organic and inorganic contaminants contained in the particulate matter or waste water is filtered by the membrane separation means, only the liquid membrane separation Passed through the means is stored in the membrane treated water storage tank 160 to be described later. That is, the wastewater introduced into the membrane separation tank 130 is stored in the membrane treated water storage tank 160 only the treated water separated by the membrane separation means.

As described above, particulate matter or organic / inorganic contaminants contained in the wastewater filtered in the process of removing nitrogen and phosphorus components and solid-liquid separation through an acid means and a membrane separation means in the membrane separation tank 130. Excess sludge of the precipitate is precipitated in the inner lower portion of the membrane separation tank (130).

Meanwhile, the supernatant in the wastewater inside the membrane separation tank 130 is introduced into the degassing tank 150 by the level difference, and the dissolved oxygen contained in the supernatant is reduced through the degassing process in the degassing tank 150. That is, in the degassing tank 150, degassing of the introduced supernatant is made to reduce the dissolved oxygen contained in the supernatant.

As described above, the supernatant of which dissolved oxygen is reduced through the degassing process is returned to the inside of the BNR reactor 120 through the degassed water return unit and mixed with the wastewater inside the BNR reactor 120 to provide anaerobic digestion and The removal of nitrogen through denitrification and nitrification can be made more smoothly.

In addition, as described above, the excess sludge precipitated in the inner lower portion of the BNR reactor 120 and the membrane separation tank 130 in the process of treating the waste water is drawn through the excess sludge drawing means is collected in the sludge treatment facility. At this time, each of the excess sludge precipitated in the inner lower portion of the BNR reactor 120 and the membrane separation tank 130 may be selectively drawn.

As described above, the membrane treated water separated through the membrane separation means and stored in the membrane treated water storage tank 160 is discharged to the discharge water system through the membrane treated water discharge pipe 162.

The ozone contact means constituting the present invention is solid-liquid separation through the membrane separation means to generate reused water for recycling the membrane treated water stored in the membrane treated water storage tank 160 for industrial water and the like. That is, the ozone contact means introduces the membrane treated water discharged into the discharge water system through the membrane treated water discharge pipe 162, and disinfects and disinfects organic and inorganic contaminants through contact with ozone (O ₃ ) for industrial use. Generates recycled water that can be reused as water.

On the other hand, in the membrane separation cleaning means which is one of the features of the wastewater treatment system 100 using the membrane separation according to the present invention is installed in the membrane separation tank 130 membrane separation module assembly 134 of the membrane separation means for solid-liquid separation Ultrasonic waves are used for cleaning. In this case, as the washing water, reused water generated through the ozone contacting means is used, and the washing water used to clean the membrane separation module assembly 134 of the membrane separating means is returned to the inside of the flow rate adjusting tank 110 to be discharged to the previous wastewater. After treatment, the water is treated.

Hereinafter, each component of the wastewater treatment system 100 using the membrane separation according to the present invention will be described in detail. First, the flow adjustment tank 110 is to adjust the processing flow rate according to the inflow of the raw waste water, such a flow adjustment tank 110 is stored and made while the inflow of the raw waste water as shown in Figures 1 and 2 Initial precipitation of particulate matter or organic and inorganic contaminants contained in

Since the flow rate adjustment tank 110 as described above is designed according to the treatment capacity of the wastewater treatment system 100 using the membrane separation according to the present invention, the flow rate is naturally adjusted. Then, when the wastewater introduced into the flow rate adjustment tank 110 is left for a predetermined time, initial precipitation of particulate matter or organic / inorganic contaminants included in the wastewater is made.

The BNR reactor 120 constituting the present invention is for removing nitrogen through removal and denitrification and nitrification of organic matter contained in raw water under anoxic conditions and aerobic conditions. Such a BNR reactor 120 is shown in FIGS. 1 and 2. As shown in the drawing, the raw waste water transferred from the flow adjusting tank 110 is formed in anoxic conditions and aerobic conditions through underwater stirring and surface aeration to remove nitrogen through removal of organic matter contained in the raw water and denitrification and nitrification.

On the other hand, the BNR reactor 120 configured as described above is provided with a surface stirring apparatus 122 for agitating or surface aeration of wastewater introduced into the BNR reactor 120. As shown in FIG. 1, the aeration surface aerator 122 forms oxygen-free oxygen through the agitation of the wastewater introduced into the BNR reactor 120 as shown in FIG. 1, while supplying oxygen to the wastewater through the surface aeration of the wastewater. To create aerobic conditions.

As described above, when the agitation of the wastewater by the underwater aeration surface aeration device 122 is performed, anaerobic digestion and denitrification reaction using the organic material in the wastewater as the incubator is performed continuously to remove nitrogen. When the surface aeration of the wastewater by the surface stirring surface aerator 122 is performed, nitrogen is removed by nitrification according to the supply of oxygen.

In other words, the BNR reactor 120 as described above is composed of a structure capable of variable operation of anoxic or aerobic conditions, the organic carbon source required for the denitrification in the case of anoxic conditions during pure water stirring through the surface aeration machine 122 In the case of aerobic conditions of surface aeration, the formation of nitrification conditions through smooth DO supply provides a technique capable of biological nitrogen treatment.

As described above, wastewater in which nitrogen is removed to some extent through anaerobic digestion, denitrification, and nitrification under anoxic and aerobic conditions is introduced into the membrane separation tank 130 in the BNR reactor 120. At this time, the wastewater flowing into the membrane separation tank 130 is introduced by the level difference, and the introduced wastewater is the supernatant on the BNR reaction tank 120.

The wastewater conveying means constituting the present invention is for forcibly conveying the wastewater stored in the flow regulating tank 110 to the inside of the BNR reactor 120, and the wastewater conveying means has a flow rate as shown in FIG. Raw wastewater flowing into the BNR reactor 120 from the adjustment tank 110 to the BNR reactor 120 and the raw wastewater flowing into the flow adjustment tank 110 through the wastewater transfer pipe 112 to the inside of the BNR reactor 120 It consists of a raw waste water pump 114.

On the other hand, the membrane separation tank 130 constituting the present invention continuously supplies oxygen to the wastewater transferred from the BNR reaction tank through acid groups to remove nitrogen by nitrification and a phosphorus component by excessive intake of microorganisms under aerobic conditions. And to allow the solid-liquid separation, this membrane separation tank 130 is a membrane treated water through the acidic means and solid-liquid separation means for supplying oxygen into the membrane separation tank 130 as shown in FIG. The membrane separation means is constructed.

As described above, the air dispersing means for supplying oxygen into the membrane separation tank 130 is installed on the inner bottom surface of the membrane separation tank 130 as shown in FIGS. The acid pores 132-1 through which the supply is made are composed of a diffuser 132 a and a blower 132 a which continuously supply oxygen to the diffuser 132 formed at a predetermined interval. At this time, the oxygen supplied by the blower (132a) is supplied to the wastewater in the membrane separation tank 130 in the form of air bubbles through the acid pores 132-1 of the diffuser 132 to the inside of the membrane separation tank 130. It is created under aerobic conditions.

As described above, when the composition is formed under aerobic conditions by oxygen supplied through the acidic means, the nitrogen and phosphorus components contained in the waste water are removed. In other words, the nitrogen present in the wastewater is removed through nitrification under the conditions of dissolved oxygen supplied by the acidic means, and various organic matters contained in the wastewater are incubated to continuously incubate a mixed group of microorganisms in the presence of dissolved oxygen. Phosphorus is removed.

The membrane separation means is for separating particulate matter or organic / inorganic contaminants contained in the wastewater. The membrane separation means is a membrane separation tank 130 as shown in FIGS. 1, 3A, and 3D. A membrane feed module assembly 134 installed at an upper side of the diffuser 132 therein, and a treatment water feed pipe 136 for transferring the treated water separated by the membrane separator module 134 to the treatment water storage tank 160. ); And a suction pump 138 installed on the treated water transfer pipe 136 to separate solid solution from the membrane separation module assembly 134 through suction pressure.

In addition, in the configuration of the membrane separation means as described above, the membrane separation module assembly 134 is installed on the upper side of the diffuser 132 inside the membrane separation tank 130, but the upper and lower assembly housing 134a and the assembly It is installed in the housing 134a at regular intervals and consists of a plurality of flat membrane modules 134b for filtering and separating the foreign matter in the suction process by the suction pump 138. At this time, the flat membrane module 134b separates the solid solution in the suction process of the suction pump 138 through the separation membrane 134b-1 formed at both sides.

When the membrane separation means configured as described above is operated by the suction pump 138, the suction pressure of the suction pump 138 causes the error in the module assembly 134 in the separation membrane 134b-1 of the flat membrane module 134b. The separation of the foreign matter from the wastewater is the discharged treated water is discharged to the treated water transfer pipe 136 through the treated water outlet (not shown) in the upper portion of the flat membrane module (134b). At this time, the membrane treated water introduced into the treated water transfer pipe 136 is collected into the membrane treated water storage tank 160 through the suction pump 138.

The excess sludge drawing means constituting the present invention is for drawing the excess sludge precipitated in the inner lower portion of the BNR reactor 120 and the membrane separation tank 130, such surplus sludge drawing means as shown in FIG. Likewise installed on the sludge drawing pipe 140, the BNR reaction tank 120 and the membrane separation tank 130, respectively installed in the BNR reaction tank 120 and the membrane separation tank 130, respectively, On / off valves (142a, 142b) and the combined sludge drawing tube 140 to enable the extraction of the excess excess sludge is installed on the inside of the BNR reactor 120 and the membrane separation tank 130 through the suction pressure It consists of a sludge suction pump 144 for sucking and discharge the excess sludge precipitated in the lower portion.

As described above, the excess sludge generated in the process of removing nitrogen through the denitrification and nitrification of the BNR reactor 120 and the solid-liquid separation of the membrane separation tank 130 is performed by the BNR reactor 120 and the membrane separation tank ( 130) It must be drawn periodically because it is sedimented at each inner bottom. Accordingly, in the present invention, the excess sludge drawing means for periodically drawing out the excess sludge was configured. In this case, the excess sludge of the BNR reactor 120 and the membrane separation tank 130 may be selectively drawn out by opening / closing the on / off valves 142a and 142b according to the generation amount of the excess sludge.

The degassing tank 150 constituting the present invention is intended to reduce the dissolved oxygen contained in the wastewater introduced from the membrane separation tank 130 through the degassing process, such a degassing tank 150 is shown in Figure 1 and As shown in FIG. 2, the supernatant is introduced from the membrane separation tank 130 to induce denitrification through the reduction of dissolved oxygen included in the supernatant.

As described above, the supernatant introduced into the degassing tank 150 from the membrane separation tank 130 is introduced through the water level difference between the membrane separation tank 130 and the degassing tank 150. That is, the supernatant in the wastewater inside the membrane separation tank 130 is introduced into the degassing tank 150 by the level difference, and the dissolved oxygen included in the supernatant is reduced through the degassing process in the degassing tank 150. That is, in the degassing tank 150, degassing of the supernatant introduced through the water level difference is performed to reduce the dissolved oxygen contained in the supernatant.

As described above, the supernatant of which dissolved oxygen is reduced through the degassing process is returned to the inside of the BNR reactor 120 through the degassing water conveying means and mixed with the wastewater inside the BNR reactor 120 to anaerobic digestion and denitrification. The removal of nitrogen through the reaction and nitrification can be made more smoothly. At this time, the degassing water conveying means is installed on the degassing water conveying pipe 152 and the degassing water conveying pipe 152 connected from the degassing tank 150 to the BNR reaction tank 120 to degassing the degassing tank 150. A degassed water return pump 154 for returning the deaerated water to the BNR reactor 120.

The membrane treated water storage tank 160 constituting the present invention stores the membrane treated water separated through the membrane separation means of the membrane separation tank 130. Such membrane treated water storage tank 160 is shown in FIG. As described above, the membrane-separated means of the membrane separation tank 130 is collected and left for a predetermined time before discharged to the discharge water system to allow the precipitation of fine foreign matters.

As described above, after the membrane treated water separated through the membrane separation means is collected and stored for a predetermined time before being discharged into the discharge system, the membrane treated water is discharged to the discharge system through the membrane treated water discharge pipe 162. Of course, the membrane treated water stored in the membrane treated water storage tank 160 may be discharged to the discharge water system, but may be reused as industrial water. At this time, there is a need to purify the membrane treated water in order to reuse it as industrial water.

As described above, the ozone contact means is configured to reuse the membrane treated water stored in the membrane treated water storage tank 160 as industrial water. The ozone contact means is for sterilizing and disinfecting the membrane treated water and oxidizing and removing the organic and inorganic contaminants. As shown in FIGS. 1 and 2, the ozone contact means is introduced into the membrane treated water and the ozone (O ₃ ). Through contact, disinfection and oxidative removal of organic and inorganic contaminants produce reusable water that can be reused as industrial water.

On the other hand, looking at the configuration of the ozone contact means as described above through the membrane treated water inlet pump 170 and the membrane treated water inlet pump 170 for introducing the membrane treated water discharged through the membrane treated water outlet pipe 162. ozone in the treated water flowed film (O ₃₎ for injecting contact to the ozone contactor for generating a reuse number, which can be reused as industrial water to remove oxidizing sanitizing and wire and inorganic contaminants by ozone (O ₃₎ ( 172).

In the wastewater treatment system 100 using the membrane separation according to the present invention configured as described above, foreign matter contained in the wastewater in the process of continuously treating the wastewater on the separation membrane 134b-1 of the membrane module 134b. It is attached to the obstacles to secure smooth and stable throughput. Therefore, the flat membrane module 134b may be periodically cleaned to remove foreign substances such as scale or suspended matter attached to the flat membrane module 134b, thereby ensuring a smooth and stable amount of processing water. Accordingly, in the present invention, the membrane separation cleaning means for cleaning the membrane separation module assembly 134 for solid-liquid separation on the membrane separation tank 130 is configured.

Membrane separation cleaning means according to the present invention is carried out in a state in which the membrane separation module assembly 134 for solid-liquid separation on the membrane separation tank 130 is moved to the membrane separation cleaning means. Looking at the structure of the membrane separation means for cleaning the cleaning tank 180, the ozone contactor 172, the cleaning tank 180 to move the membrane separation module assembly 134 on the membrane separation tank 130 to the inside to clean the cleaning tank ( Recycling water supply pipe 182, which is supplied to the interior of the 180 to immerse the membrane separation module assembly 134 transferred into the interior of the cleaning tank 180, the air is installed in the lower portion of the cleaning tank 180 through the air bubble Forming the air dispersing means for supplying the inner side of the membrane separation module assembly 134 located in the upper portion, installed in the inner lower portion of the cleaning tank 180, the membrane separation module assembly 134 through ultrasonic vibration by the oscillation of ultrasonic waves Cleaning by ultrasonic vibration by the ultrasonic vibrator 184 and the ultrasonic vibrator 184 separating the scale or contaminants attached to the separation membrane 134b-1 of the flat membrane module 134b constituting the structure or weakening its adhesion. Cleaning inside the after washing tank 180 It made with the washing water conveying means for conveying a flow rate-adjusting tank 110.

In the configuration of the membrane separation cleaning means as described above, the ultrasonic vibrator 184 is installed between the bottom surface of the cleaning tank 180 and the lower surface of the module assembly 134 as shown in FIGS. 4A and 4B. Precisely, it is installed in the form of a fork between the cleaning diffusers 132. The ultrasonic vibrator 184 installed as described above generates ultrasonic vibration by the ultrasonic generator so as to separate foreign substances such as scales or suspended matter attached on the outer surface of the separator 134b-1 of the flat membrane module 134b or weaken the adhesive force thereof. In order to be easily separated from the separation membrane 134b-1 by the water flow by the cleaning diffuser 132.

In addition, in the configuration of the membrane separation cleaning means as described above, the cleaning air dispersing means is installed on the inner bottom surface of the cleaning tank 180, but a plurality of acid pores 132-1 through which oxygen is supplied are formed at regular intervals. It consists of a diffuser 132 and a blower 132a for continuously supplying oxygen to the diffuser 132.

As described above, the diffuser 132 of the diffuser means for cleaning is configured to extend the diffuser 132 of the diffuser means continuously supplying the dissolved oxygen to the inside of the membrane separation tank 130, and the blower of the diffuser means for cleaning 132a is also composed of a blower 132a of the air dispersing means for continuously supplying dissolved oxygen into the membrane separation tank.

In addition, in the configuration of the membrane separation cleaning means described above, the washing water conveying means is provided on the washing water conveying pipe 186 and the washing water conveying pipe 186 connected from the washing tank 180 to the flow rate adjusting tank 110. It consists of a washing | cleaning water conveying pump 186a which conveys a washing | cleaning water from the washing tank 180 to the flow adjustment tank 110 through the washing | cleaning water conveying pipe 186.

As described above, since the washing water generated after washing the membrane separation module assembly 134 through the membrane separation washing means contains contaminants, it is necessary to return the washing water to the flow rate adjusting tank 110 through the washing water conveying means for reprocessing. There is this.

On the other hand, in the configuration according to the present invention flows into the bubbles generated from the diffuser 132 inside the membrane separation tank 130 and the module assembly 134 to interfere with the separation membrane 134b-1 of the flat membrane module 134b. A plurality of media balls 190 for separating the foreign matter attached to the separation membrane 134b-1 are further configured.

The media ball 190 configured as described above is raised with bubbles and flows between the flat membrane modules 134b installed at regular intervals while interfering with the separation membrane 134b-1 to prevent foreign substances from adhering to the surface. Afterwards it is made of a configuration having a constant size and weight so as to be recycled to the lower side of the module assembly 134 again along the flow of water to continuously clean the separator (134b-1).

In other words, the technology according to the present invention further comprises a plurality of media balls 190 for separating foreign matter attached to the separator 134b-1 through interference with the separator 134b-1 of the flat membrane module 134b. . That is, the foreign matter adhering to the separation membrane 134b-1 through interference with the separation membrane 134b-1 of the flat membrane module 134b by flowing into the bubbles generated from the diffuser 132 inside the membrane separation module assembly 134. A plurality of media balls 190 for separating the is further configured.

The media ball 190 configured as described above is interposed with the separation membrane 134b-1 while flowing between the flat membrane modules 134b installed at a predetermined interval while rising with bubbles, and thus foreign matter is deposited on the surface of the separation membrane 134b-1. Make sure that they are not sticking to each other and that the foreign objects are stuck. The media ball 190 acting as described above is configured to have a constant size and weight so that the media ball 190 may be recycled to the lower side of the module assembly 134 again along the flow of water to continuously clean the separator 134b-1.

The media ball 190 configured as described above is formed in the shape of a polygon with a wing plate integrally formed at each end of a round or spherical shape having a whole outer surface, and the material is polyethylene, acrylonitrile butadiene styrene, teflon, vinyl chloride and It is formed of any one material of polyurethane.

In other words, the media ball 190 configured as described above is able to continuously tap the separator 134b-1 of each flat membrane module 134b while circulating up and down along the stream of water inside the membrane separator 130. It consists of numbers. At this time, each media ball 190 is formed by a constant weight so as to be raised by the bubble generated from the diffuser 132, while the bubble does not exist to sink to the bottom by its own load. In addition, the media ball 190 is formed in various shapes so as to smoothly rise by the bubbles to knock off the separation membrane 134b-1 to drop foreign substances.

The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the technical idea of the present invention.

1 is a process diagram showing a wastewater treatment system using a membrane separation according to the present invention.

Figure 2 is a block diagram showing a wastewater treatment system using a membrane separation in accordance with the present invention.

Figure 3a is a perspective view showing the configuration of the membrane separation tank in the configuration of the wastewater treatment system using the membrane separation according to the present invention.

Figure 3b is a plan view showing the configuration of the membrane separation tank in the configuration of the wastewater treatment system using the membrane separation according to the present invention.

Figure 3c is a cross-sectional view showing the configuration of the membrane separation tank in the configuration of the wastewater treatment system using the membrane separation according to the present invention.

Figure 3d is an enlarged cross-sectional view showing the configuration of the membrane separation tank in the configuration of the wastewater treatment system using the membrane separation according to the present invention.

Figure 4a is a perspective configuration diagram schematically showing the configuration of the cleaning means in the configuration of the wastewater treatment system using membrane separation according to the present invention.

Figure 4b is a schematic cross-sectional view showing the configuration of the cleaning means in the configuration of the wastewater treatment system using membrane separation according to the present invention.

[Simple description of symbols for the main parts of the drawings]

100. Wastewater Treatment System 110. Flow Adjustment Tank

112. Wastewater transfer pipe 114. Wastewater transfer pump

120. BNR reactor 122. Surface stirring machine

130. Membrane Separation Tank 132.

132a. Blower 134. Membrane separation module assembly

134a. Assembly housing 134b. Flat membrane module

134b-1. Membrane 136. Treatment Water Transfer Pipe

138. Suction pump 140. Sludge drawing pipe

142. On / Off Valve 144. Sludge Suction Pump

150. Degassing tank 152. Degassing water return pipe

154. Degassed water return pump 160. Membrane treated water storage tank

162. Membrane discharge line 170. Membrane inflow pump

172. Ozone Contactor 180. Cleaning Tank

182. Recycled water supply pipe 184. Ultrasonic vibrator

186. Washing water return pipe 186a. Washing water return pump

190.Media Ball

Claims (16)

A flow adjustment tank in which raw waste water is introduced and initial precipitation of organic or inorganic substances is made; A BNR reactor for removing the organic matter contained in the raw water and nitrogen through denitrification and nitrification by forming anoxic conditions or preconditions through stirring and surface aeration of the raw waste water transferred from the flow adjusting tank; Underwater agitation surface aeration equipment installed on the BNR reaction tank to form an aerobic condition through the agitation of the raw waste water transported or through the supply of oxygen through the surface aeration of the raw waste water; Raw wastewater transfer means for transferring the raw wastewater inside the flow rate adjustment tank into the BNR reactor; A membrane separation tank for continuously supplying oxygen to the wastewater transferred from the BNR reaction tank through an acid group to remove nitrogen by nitrification, phosphorus component removal by excessive intake of microorganisms, and solid-liquid separation under aerobic conditions; Diffuser means for continuously supplying dissolved oxygen through an acid group to the inside of the membrane separation tank to create an aerobic condition; Membrane separation means for immersing in the wastewater inside the membrane separation tank for solid-liquid separation of the wastewater; Excess sludge drawing means for drawing excess sludge precipitated in the BNR reactor and the membrane separation tank; A degassing tank inducing denitrification by introducing supernatant from the membrane separation tank and reducing dissolved oxygen contained in the supernatant; Degassing water conveying means for conveying degassed water degassed in the degassing tank to the BNR reactor; A membrane treated water storage tank for storing membrane treated water in which solid-liquid separation is conducted through the membrane separation means; A membrane treated water discharge pipe discharged to the discharge water system of the membrane treated water storage tank; The membrane treated water discharged through the membrane treated water discharge pipe is introduced to generate the reused water which can be reused as industrial water by disinfecting and disinfecting organic and inorganic contaminants through contact with ozone (O ₃ ). Ozone contact means; And Wastewater treatment system using a membrane separation consisting of a membrane separation cleaning means for cleaning the membrane separation means to remove the adhered foreign matter. According to claim 1, wherein the wastewater conveying means is a wastewater conveying pipe connected to the BNR reaction tank from the flow rate adjustment tank; And Wastewater treatment system using a membrane separation, characterized in that consisting of the wastewater transfer pump for transferring the wastewater introduced into the flow rate adjustment tank to the inside of the BNR reaction tank through the wastewater transfer pipe. According to claim 2, The air dispersing means is installed on the inner bottom surface of the membrane separation tank, the air diffuser is formed a plurality of acid pores are supplied at a predetermined interval; And Wastewater treatment system using a membrane separation, characterized in that consisting of a blower for continuously supplying oxygen to the diffuser. According to claim 3, The membrane separation means is a membrane separation module assembly which is installed on the upper side of the diffuser in the membrane separation tank; A treated water feed pipe configured to transfer the treated water separated by the membrane separation module assembly to the treated water storage tank; And The wastewater treatment system using the membrane separation, characterized in that the suction pump is installed on the treated water conveying pipe made of a suction liquid to be separated from the membrane separation module assembly through the suction pressure. The assembly of claim 4, wherein the membrane separation module assembly comprises: an assembly housing which is installed on an upper side of an diffuser inside the membrane separation tank and is opened up and down; And Installed in the interior of the assembly housing at a predetermined interval wastewater treatment system using a membrane separation, characterized in that consisting of a plurality of flat membrane modules to filter off the foreign matter in the suction process by the suction pump. The method of claim 5, wherein the excess sludge drawing means is installed in each of the BNR reactor and the membrane separation tank, the sludge drawing pipe is combined; An on / off valve installed on the sludge drawing pipe of each of the BNR reactor and the membrane separation tank to enable the selective drawing of the excess sludge; And The wastewater treatment system using a membrane separation, characterized in that the sludge suction pump is installed on the combined sludge withdrawal pipe to suck and discharge the excess sludge precipitated in the inner lower portion of the BNR reaction tank and the membrane separation tank through the suction pressure. The degassing water conveying means of claim 6, further comprising: a degassing water conveying pipe connected to the BNR reaction tank from the degassing tank; And A dewatering treatment system using membrane separation, characterized in that the degassing treatment water return pump installed on the degassing water conveying pipe to return the degassed water from the degassing tank to the BNR reactor. The method of claim 7, wherein the ozone contact means comprises a membrane treated water inflow pump for introducing the membrane treated water discharged through the membrane treated water discharge pipe; And Ozone (O ₃ ) is injected into and contacted with the membrane treated water introduced through the membrane treated water inflow pump to sterilize and disinfect by ozone (O ₃ ) and oxidize and remove organic and inorganic contaminants, which can be reused as industrial water. Wastewater treatment system using a membrane separation, characterized in that consisting of ozone contactor for the reuse of water. According to claim 8, wherein the membrane separation means for cleaning the membrane separation module assembly on the membrane separation tank for cleaning the inside; A reuse water supply pipe for supplying recycled water generated through the ozone contactor to the inside of the cleaning tank to immerse the membrane separation module assembly transferred into the cleaning tank; An air dispersing means installed at an inner lower portion of the washing tank and forming air bubbles through an air diffuser to supply the inside of the membrane separation module assembly located at an upper portion thereof; An ultrasonic vibrator installed at an inner lower portion of the cleaning tank to separate the scale or contaminants attached to the separator of the flat membrane module constituting the module assembly through ultrasonic vibration by the oscillation of the ultrasonic wave, or to weaken the adhesion thereof; And And a washing water conveying means for conveying the washing water inside the washing tank to the flow rate adjusting tank after washing through the ultrasonic vibration by the ultrasonic vibrator. 10. The method of claim 9, wherein the air dispersing means for dispersing is provided on the inner bottom surface of the cleaning tank is provided with a plurality of acid pores formed at a predetermined interval to the oxygen supply; And Wastewater treatment system using a membrane separation, characterized in that consisting of a blower for continuously supplying oxygen to the diffuser. 11. The method of claim 10, wherein the diffuser of the cleaning air dispersing means is an extension of the diffuser means for continuously supplying the dissolved oxygen to the inside of the membrane separation tank, the blower of the cleaning air dispersing means is also Wastewater treatment system using a membrane separation, characterized in that the configuration of the blower of the air dispersing means to continuously supply the dissolved oxygen therein. 11. The cleaning apparatus according to claim 10, wherein the washing water conveying means comprises: a washing water conveying pipe connected to the flow rate adjusting tank from the washing tank; And And a washing water conveying pump installed on the washing water conveying pipe and conveying the washing water from the washing tank to the flow rate adjusting tank through the washing water conveying pipe. The method according to any one of claims 5 to 12, wherein the inside of the membrane separation tank and the module assembly flows through the bubbles generated from the diffuser to separate foreign matter adhering to the separation membrane through interference with the separation membrane of the flat membrane module. Wastewater treatment system using a membrane separation, characterized in that a plurality of media ball is further configured. 14. The media ball according to claim 13, wherein the media ball flows between the flat membrane modules installed at regular intervals while rising together with bubbles to interfere with the separation membrane so that no foreign matter adheres to the surface. A wastewater treatment system using membrane separation, characterized in that it has a constant size and weight to be recycled to the lower side of the assembly to continuously wash the separation membrane. 17. The wastewater treatment system according to claim 16, wherein the media ball is formed in a polygonal shape in which a wing plate is integrally formed at each end of a rounded spherical or star shape. The wastewater treatment system using membrane separation according to claim 15, wherein the media ball is formed of any one of polyethylene, acrylonitrile butadiene styrene, teflon, vinyl chloride, and polyurethane.

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